| 渤海海域锦州25-1油田地震勘探技术难点及对策 |
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| 引用本文： | 张志军,徐长贵.渤海海域锦州25-1油田地震勘探技术难点及对策[J].海洋地质动态,2014,30(11):52-57. |
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| 作者姓名： | 张志军 徐长贵 |
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| 作者单位： | 中海石油(中国)有限公司天津分公司渤海石油研究院; |
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| 摘 要： | 针对辽西低凸起古近系圈闭地震研究中存在的几个技术难点提出了相应的研究路线,实现了对该区构造和储层的精细描述。研究以先进的综合地震工作站为平台,以地震解释为中心,与地质、测井研究密切配合,应用多项地震勘探新技术对地震数据体进行分析研究。应用地震地质多信息综合标定技术,实现了地震层位的精确标定;基于地质模型约束的变层速度模型保证了时深转换的准确性;虚拟现实与三维可视化技术相结合的全三维地震解释贯穿地震研究的全过程;以运用基于自组织人工神经网络分析(SOM)和主成分分析(PCA)的地震相分析技术对地震属性及所反映的地质特征进行分析解释,得到与地震相相对应的沉积相,大大提高了储层研究的精确度和可信度。锦州25区实际钻探结果表明所提出的几种技术方法组合能够有效地解决该区地球物理研究中存在的主要问题。
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| 关 键 词： | 层位标定 全三维解释 时深转换 储层预测 |
TECHNICAL DIFFICULTIES AND COUNTERMEASURES FOR GEOPHYSICAL RESEARCH IN JINZHOU 25-1 OILFIELD |
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| ZHANG Zhijun,XU Changgui.TECHNICAL DIFFICULTIES AND COUNTERMEASURES FOR GEOPHYSICAL RESEARCH IN JINZHOU 25-1 OILFIELD[J].Marine Geology Development,2014,30(11):52-57. |
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| Authors: | ZHANG Zhijun XU Changgui |
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| Institution: | (Bohai Oilfield Exploration and Development Research Institute of China National Offshore Oilfield Corporation Limite-Tianjin, Tanggu 300452, Tianjin, China) |
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| Abstract: | A new approach for eliminating multiples is proposed in this paper.The approach is based upon the combination of the events realigning with the singular value decomposition（SVD）technology.The process of our approach to suppress multiples is as follows：（1）track reverberations via accurate ray tracing and divide the shot gather into different reasonable time windows according to the traced time-distance curves of reverberations.Within each time window,the multiple events are aligned to be horizontally flat.（2）filter out reverberations with SVD technology.（3）re-align the filtered data back to the original shot gather.Remove all reverberations tracked by ray tracing,and then,we can complete the multiple attenuation.Compared to conventional methods,our approach takes the mechanism of multiples into account adequately and requires no model.Further more,we can remove the multiples directly in shot gather without analyzing the velocity spectrum jumbled by multiples.The processing of synthetic and real examples clearly demonstrates the validity of the technology presented in this thesis. |
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| Keywords: | horizon calibration real 3Dseismic interpretation time-depth conversion reservoir prediction |
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